Question: What was the position of Lee hsien Loong held on 2004-8-12?
Paraphrase: Which position did  Lee hsien Loong hold on 2004-8-12?
SPARQL (Wikidata): SELECT ?obj WHERE { wd:Q57643 p:P39 ?s . ?s ps:P39 ?obj . ?s pq:P580 ?x filter(contains(YEAR(?x),'2004')) }